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Commit0ec3e13

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Fix tab completion of "SET variable TO|=" to not offer bogus completions.
Don't think that the context "UPDATE tab SET var =" is a GUC-settingcommand.If we have "SET var =" but the "var" is not a known GUC variable,don't offer any completions. The most likely explanation is thatwe've misparsed the context and it's not really a GUC-setting command.Per gripe from Ken Tanzer. Back-patch to 9.6. The issue existsfurther back, but before 9.6 the code looks very different and itdoesn't actually know whether the "var" name matches anything,so I desisted from trying to fix it.Discussion:https://postgr.es/m/CAD3a31XpXzrZA9TT3BqLSHghdTK+=cXjNCE+oL2Zn4+oWoc=qA@mail.gmail.com
1 parent4d6603f commit0ec3e13

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1 file changed

+26
-13
lines changed

1 file changed

+26
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‎src/bin/psql/tab-complete.c

Lines changed: 26 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -3362,8 +3362,13 @@ psql_completion(const char *text, int start, int end)
33623362
elseif (HeadMatches("ALTER","DATABASE|FUNCTION|PROCEDURE|ROLE|ROUTINE|USER")&&
33633363
TailMatches("SET",MatchAny))
33643364
COMPLETE_WITH("FROM CURRENT","TO");
3365-
/* Suggest possible variable values */
3366-
elseif (TailMatches("SET",MatchAny,"TO|="))
3365+
3366+
/*
3367+
* Suggest possible variable values in SET variable TO|=, along with the
3368+
* preceding ALTER syntaxes.
3369+
*/
3370+
elseif (TailMatches("SET",MatchAny,"TO|=")&&
3371+
!TailMatches("UPDATE",MatchAny,"SET",MatchAny,"TO|="))
33673372
{
33683373
/* special cased code for individual GUCs */
33693374
if (TailMatches("DateStyle","TO|="))
@@ -3381,21 +3386,29 @@ psql_completion(const char *text, int start, int end)
33813386
/* generic, type based, GUC support */
33823387
char*guctype=get_guctype(prev2_wd);
33833388

3384-
if (guctype&&strcmp(guctype,"enum")==0)
3389+
/*
3390+
* Note: if we don't recognize the GUC name, it's important to not
3391+
* offer any completions, as most likely we've misinterpreted the
3392+
* context and this isn't a GUC-setting command at all.
3393+
*/
3394+
if (guctype)
33853395
{
3386-
charquerybuf[1024];
3396+
if (strcmp(guctype,"enum")==0)
3397+
{
3398+
charquerybuf[1024];
33873399

3388-
snprintf(querybuf,sizeof(querybuf),Query_for_enum,prev2_wd);
3389-
COMPLETE_WITH_QUERY(querybuf);
3390-
}
3391-
elseif (guctype&&strcmp(guctype,"bool")==0)
3392-
COMPLETE_WITH("on","off","true","false","yes","no",
3393-
"1","0","DEFAULT");
3394-
else
3395-
COMPLETE_WITH("DEFAULT");
3400+
snprintf(querybuf,sizeof(querybuf),
3401+
Query_for_enum,prev2_wd);
3402+
COMPLETE_WITH_QUERY(querybuf);
3403+
}
3404+
elseif (strcmp(guctype,"bool")==0)
3405+
COMPLETE_WITH("on","off","true","false","yes","no",
3406+
"1","0","DEFAULT");
3407+
else
3408+
COMPLETE_WITH("DEFAULT");
33963409

3397-
if (guctype)
33983410
free(guctype);
3411+
}
33993412
}
34003413
}
34013414

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